Acid-catalysed transformation of α-trifluoromethanesulfonates of γ- and δ-lactones into 2,5-disubstituted homochiral tetrahydrofurans
作者:Joseph R. Wheatley、Claire J. F. Bichard、Simon J. Mantell、Jong Chan Son、David J. Hughes、George W. J. Fleet、David Brown
DOI:10.1039/c39930001065
日期:——
Excellent yields of methyl tetrahydrofuran-α-carboxylates are obtained by treatment of 2-O-trifluoromethanesulfonates (triflates) of either 1,4-or 1,5-lactones with acid in methanol; in some cases, very different tetrahydrofurans may result from acid or base treatment of a methanolic solution of the same starting material.
在甲醇中用酸处理 1,4- 或 1,5- 内酯的 2-O-三氟甲磺酸盐(三酸盐),可获得收率极高的四氢呋喃-δ-羧酸甲酯;在某些情况下,用酸或碱处理相同起始原料的甲醇溶液,可能会产生截然不同的四氢呋喃。